数据传递到另一个类 [英] Pass data to another class

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本文介绍了数据传递到另一个类的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我有两个表,一个是信息,另一个是 WorkDetailsTable 。活动的流程 Information.java>> WorkDetailsTable.java 按意图。当按钮 Information.java 点击了,它会保存所有数据,并传递给 WorkDetails.java

Information.java

 按钮按钮=(按钮)findViewById(R.id.button5);       button.setOnClickListener(新View.OnClickListener(){
            公共无效的onClick(查看为arg0){
                意向意图=新意图(背景下,WorkDetailsTable.class);
                intent.putExtra(一,一);
                intent.putExtra(b的,二);
                intent.putExtra(日期1,DATE1);
                intent.putExtra(C,C);                startActivity(意向);
            }
        });

WorkDetailsTable

 公共无效的onCreate(捆绑savedInstanceState){
super.onCreate(savedInstanceState);
最终的字符串名称= getIntent()getExtras()的getString(A)。;从Information.java //获取数据
最终字符串天气= getIntent()getExtras()的getString(B)。;
。最后弦乐日期= getIntent()getExtras()的getString(日期1);
。最后弦乐状态= getIntent()getExtras()的getString(C)。
TS =新com.example.project.project.API.InfoAPI(本);
WD =新com.example.project.project.API.WorkDetailsAPI(本);
按钮BTN1 =(按钮)findViewById(R.id.button2);
       btn1.setOnClickListener(新View.OnClickListener(){
             公共无效的onClick(查看为arg0){
                    W1 = txtWork1.getText()的toString()。
                    W2 = txtWork2.getText()的toString()。
                    W3 = txtWork3.getText()的toString()。
                    W4 = txtWork4.getText()的toString()。
                    。P1 = per1.getText()的toString();
                    。P2 = per2.getText()的toString();
                    。P3 = per3.getText()的toString();
                    。P4 = per4.getText()的toString();
                    ts.insertTimeSheet(姓名,天气,日期,状态);
//插入多个行工作内容表,身份证自动增加,但外键保持不变
                    WD.insertWorkDetails(A1,W 1,P 1,B,C,TH);
                    WD.insertWorkDetails(A2,W2,P2,D,E1,TH);
                    WD.insertWorkDetails(A3,W3,P3,F,G,日);
                    WD.insertWorkDetails(A4,W4,P4,H,I,TH);
                }
            });
        }

InfoAPI.java

 公共字符串[] allColumns={MyDatabaseHelper.ID,MyDatabaseHelper.Name,MyDatabaseHelper.Weather,MyDatabaseHelper.Date,MyDatabaseHelper.Status};
 众长insertTimeSheet(字符串名称,字符串天气,日期字符串,字符串状态)
    {
        数据库= dbHelper.getWritableDatabase();
        ContentValues​​值=新ContentValues​​();
        values​​.put(MyDatabaseHelper.Name,名);
        values​​.put(MyDatabaseHelper.Weather,天气);
        values​​.put(MyDatabaseHelper.Date,日期);
        values​​.put(MyDatabaseHelper.Status,地位);
        database.insert(MyDatabaseHelper.TABLE_INFO,空,价值);
        database.close();
        返回0;    }

WorkDetailsAPI.java

 公共字符串[] allColumns={MyDatabaseHelper.ID2,MyDatabaseHelper.Project,MyDatabaseHelper.WorkDescription,MyDatabaseHelper.Per,MyDatabaseHelper.TimeIn,MyDatabaseHelper.TimeOut,MyDatabaseHelper.TotalHours,MyDatabaseHelper.TableInfo_id};
 众长insertWorkDetails(字符串项目,字符串workDescription,每串,串timeIn,超时字符串,字符串totalHours)
    {
        数据库= dbHelper.getWritableDatabase();
        ContentValues​​值=新ContentValues​​();
        values​​.put(MyDatabaseHelper.Project,项目);
        values​​.put(MyDatabaseHelper.WorkDescription,workDescription);
        values​​.put(MyDatabaseHelper.Per,份);
        values​​.put(MyDatabaseHelper.TimeIn,timeIn);
        values​​.put(MyDatabaseHelper.TimeOut,超时);
        values​​.put(MyDatabaseHelper.TotalHours,totalHours);
        database.insert(MyDatabaseHelper.TABLE_WORKDETAILS,空,价值);
        database.close();
        返回0;    }

MyDatabaseHelper.java

 公共无效的onCreate(SQLiteDatabase DB)
    {
        db.execSQL(CREATE TABLE+ TABLE_INFO +(ID INTEGER PRIMARY KEY,Name文本,天气文本,日期DATETIME,状态文本));
        db.execSQL(CREATE TABLE+ TABLE_WORKDETAILS +(ID INTEGER PRIMARY KEY,项目文本,WorkDescription TEXT,每文本,TimeIn DATETIME,超时DATETIME,TotalHours DATETIME,TableInfo_id INTEGER,外键(TableInfo_id)参考文献TABLE_INFO(ID)) ;
    }

为了使我的问题更容易理解,我总结如下它:

  1。这是将数据传递到另一个类,并将它们保存到不同的表中的正确方法是什么?
2.如何插入一个外键到另一个表?

我也问过这关系到我的问题类似的问题。请参阅插入的外键到表

当我跑我的项目,它出来有错误。

  4月10日至2日:56:29.104 5016-5030 / com.example.project.project E /表面:getSlotFromBufferLocked:未知缓冲区:0xb4057be0
4月10日至2日:56:29.107 5016-5030 / com.example.project.project D / OpenGLRenderer:手柄0xabe46820上0xa2d54000(RippleDrawable)endAllStagingAnimators
4月10日至2日:56:34.936 5016-5016 / com.example.project.project E / SQLiteLog:(1)近tableWork:语法错误
4月10日至2日:56:34.974 5016-5016 / com.example.project.project D / AndroidRuntime:关闭VM
4月10日至2日:56:34.974 5016-5016 / com.example.project.project E / AndroidRuntime:致命异常:主要
    工艺:com.example.project.project,PID:5016
    android.database.sqlite.SQLiteException:近tableWork:语法错误(code 1),在编译:创建tableWork详细信息(ID INTEGER PRIMARY KEY,项目文本,WorkDescription TEXT,每文本,TimeIn DATETIME,超时DATETIME ,TotalHours DATETIME,TableInfo_id INTEGER,外键(TableInfo_id)参考文献TABLE_INFO(ID)
            在android.database.sqlite.SQLiteConnection.native prepareStatement(本机方法)
            在android.database.sqlite.SQLiteConnection.acquire preparedStatement(SQLiteConnection.java:887)


解决方案

问题是在你创建查询,第二个。


  

db.execSQL(CREATE TABLE+ TABLE_WORKDETAILS +(ID INTEGER PRIMARY KEY,项目文本,WorkDescription TEXT,每文本,TimeIn DATETIME,超时DATETIME,TotalHours DATETIME,TableInfo_id INTEGER,外键(TableInfo_id)参考文献TABLE_INFO(ID ));


您记录显示,这是它在执行查询:


  

android.database.sqlite.SQLiteException:近tableWork:语法错误(code 1),在编译:创建tableWork详细信息(ID INTEGER PRIMARY KEY,项目文本,WorkDescription TEXT,每文本,TimeIn DATETIME ,超时DATETIME,TotalHours DATETIME,TableInfo_id INTEGER,外键(TableInfo_id)参考文献TABLE_INFO(ID)


首先,你错过了表之后的空间。其次,你不断的 TABLE_WORKDETAILS 值为工作细节。表名不能有空格,所以将其更改为 Work_Details 。你也应该给后空间外键(TableInfo_id)

这应该是这样的:

  db.execSQL(CREATE TABLE+ TABLE_WORKDETAILS +(ID INTEGER PRIMARY KEY,项目文本,WorkDescription TEXT,每文本,TimeIn DATETIME,超时DATETIME,TotalHours DATETIME,TableInfo_id INTEGER,外键(TableInfo_id)参考+ TABLE_INFO +(ID)));

I have two tables,one is Information and another is WorkDetailsTable. The flow of activity is Information.java>>WorkDetailsTable.java by intent. When button in Information.java has clicked, it will save all the data and pass to WorkDetails.java.

Information.java

 Button button=(Button)findViewById(R.id.button5);

       button.setOnClickListener(new View.OnClickListener() {
            public void onClick(View arg0) {
                Intent intent = new Intent(context, WorkDetailsTable.class);
                intent.putExtra("a",a);
                intent.putExtra("b",b);
                intent.putExtra("date1",date1);
                intent.putExtra("c",c);

                startActivity(intent);
            }
        });

WorkDetailsTable

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final String name=getIntent().getExtras().getString("a"); // data get from Information.java
final String weather=getIntent().getExtras().getString("b");
final String date=getIntent().getExtras().getString("date1");
final String status=getIntent().getExtras().getString("c");
ts= new com.example.project.project.API.InfoAPI(this);
WD= new com.example.project.project.API.WorkDetailsAPI(this);
Button btn1=(Button)findViewById(R.id.button2);
       btn1.setOnClickListener(new View.OnClickListener() {
             public void onClick(View arg0) {
                    W1=txtWork1.getText().toString();
                    W2=txtWork2.getText().toString();
                    W3=txtWork3.getText().toString();
                    W4=txtWork4.getText().toString();
                    P1=per1.getText().toString();
                    P2=per2.getText().toString();
                    P3=per3.getText().toString();
                    P4=per4.getText().toString();
                    ts.insertTimeSheet(name,weather,date,status); 
//insert multiple row to Work Details table, Id auto increment but foreign key remains the same
                    WD.insertWorkDetails(a1,W1,P1,b,c,th);
                    WD.insertWorkDetails(a2,W2,P2,d,e1,th);
                    WD.insertWorkDetails(a3, W3, P3, f, g,th);
                    WD.insertWorkDetails(a4,W4,P4,h,i,th);
                }
            });
        }

InfoAPI.java

public String[] allColumns={MyDatabaseHelper.ID,MyDatabaseHelper.Name,MyDatabaseHelper.Weather,MyDatabaseHelper.Date,MyDatabaseHelper.Status};
 public long insertTimeSheet(String name,String weather,String date,String status)
    {
        database=dbHelper.getWritableDatabase();
        ContentValues values=new ContentValues();
        values.put(MyDatabaseHelper.Name,name);
        values.put(MyDatabaseHelper.Weather,weather);
        values.put(MyDatabaseHelper.Date,date);
        values.put(MyDatabaseHelper.Status,status);
        database.insert(MyDatabaseHelper.TABLE_INFO,null,values);
        database.close();
        return 0 ;

    }

WorkDetailsAPI.java

     public String[] allColumns={MyDatabaseHelper.ID2,MyDatabaseHelper.Project,MyDatabaseHelper.WorkDescription,MyDatabaseHelper.Per,MyDatabaseHelper.TimeIn,MyDatabaseHelper.TimeOut,MyDatabaseHelper.TotalHours,MyDatabaseHelper.TableInfo_id};
 public long insertWorkDetails(String project, String workDescription, String per,String timeIn,String timeOut,String totalHours)
    {
        database=dbHelper.getWritableDatabase();
        ContentValues values=new ContentValues();
        values.put(MyDatabaseHelper.Project,project);
        values.put(MyDatabaseHelper.WorkDescription,workDescription);
        values.put(MyDatabaseHelper.Per,per);
        values.put(MyDatabaseHelper.TimeIn,timeIn);
        values.put(MyDatabaseHelper.TimeOut,timeOut);
        values.put(MyDatabaseHelper.TotalHours,totalHours);
        database.insert(MyDatabaseHelper.TABLE_WORKDETAILS,null,values);
        database.close();
        return 0 ;

    }

MyDatabaseHelper.java

 public void onCreate(SQLiteDatabase db)
    {
        db.execSQL("create table "+TABLE_INFO+"(ID INTEGER PRIMARY KEY ,Name TEXT,Weather TEXT, Date DATETIME, Status Text)");
        db.execSQL("create table"+TABLE_WORKDETAILS+"(ID INTEGER PRIMARY KEY , Project TEXT, WorkDescription TEXT, Per Text, TimeIn DATETIME, TimeOut DATETIME,TotalHours DATETIME, TableInfo_id INTEGER, FOREIGN KEY(TableInfo_id)REFERENCES TABLE_INFO(ID)");
    }

To make my question more understandable, I have summarized it as below:

1. Is this the correct way to pass the data to another class and save them to different table ?
2. How to insert a foreign key into another table? 

I have asked a similar question which related to my problem. Kindly refer Inserting a foreign key into a table

When I run my project, it comes out with errors.

10-02 04:56:29.104    5016-5030/com.example.project.project E/Surface﹕ getSlotFromBufferLocked: unknown buffer: 0xb4057be0
10-02 04:56:29.107    5016-5030/com.example.project.project D/OpenGLRenderer﹕ endAllStagingAnimators on 0xa2d54000 (RippleDrawable) with handle 0xabe46820
10-02 04:56:34.936    5016-5016/com.example.project.project E/SQLiteLog﹕ (1) near "tableWork": syntax error
10-02 04:56:34.974    5016-5016/com.example.project.project D/AndroidRuntime﹕ Shutting down VM
10-02 04:56:34.974    5016-5016/com.example.project.project E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.example.project.project, PID: 5016
    android.database.sqlite.SQLiteException: near "tableWork": syntax error (code 1): , while compiling: create tableWork Details(ID INTEGER PRIMARY KEY , Project TEXT, WorkDescription TEXT, Per Text, TimeIn DATETIME, TimeOut DATETIME,TotalHours DATETIME, TableInfo_id INTEGER, FOREIGN KEY(TableInfo_id)REFERENCES TABLE_INFO(ID)
            at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
            at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:887)

解决方案

The problem is in your create query, the second one.

db.execSQL("create table"+TABLE_WORKDETAILS+"(ID INTEGER PRIMARY KEY , Project TEXT, WorkDescription TEXT, Per Text, TimeIn DATETIME, TimeOut DATETIME,TotalHours DATETIME, TableInfo_id INTEGER, FOREIGN KEY(TableInfo_id)REFERENCES TABLE_INFO(ID)");

You logs show that this is the query which is executed:

android.database.sqlite.SQLiteException: near "tableWork": syntax error (code 1): , while compiling: create tableWork Details(ID INTEGER PRIMARY KEY , Project TEXT, WorkDescription TEXT, Per Text, TimeIn DATETIME, TimeOut DATETIME,TotalHours DATETIME, TableInfo_id INTEGER, FOREIGN KEY(TableInfo_id)REFERENCES TABLE_INFO(ID)

Firstly, you missed the space after table. Secondly, your constant TABLE_WORKDETAILS value is Work Details. The table name should not have spaces, so change it to Work_Details. You should also give space after FOREIGN KEY(TableInfo_id).

It should be like this:

 db.execSQL("create table "+TABLE_WORKDETAILS+"(ID INTEGER PRIMARY KEY , Project TEXT, WorkDescription TEXT, Per Text, TimeIn DATETIME, TimeOut DATETIME,TotalHours DATETIME, TableInfo_id INTEGER, FOREIGN KEY(TableInfo_id) REFERENCES "+TABLE_INFO+"(ID))");

这篇关于数据传递到另一个类的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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